Machine for cutting off lengths from bars



March 26, 1929. L. G. TAYLOR MACHINE FOR CUTTING OFF LENGTHS FROM BARSFiled Dec. 30, 1927 3 Sheets-Sheet l a sn ets-sheet 2 L. G. TAYLOR FiledDec. 50, 1927 March 26, 1929.

v MACHINE FOR CUTTING OFF LENGTHS FRO! BARS March 26, 1929. 1.. G.TAYLOR MAGHINE FOR CUTTING OFF LENGTHS FROM BARS Filed Dec. 30, 4927 3Sheets-Sheet lZewe T Zorw as K 2 titi Patented Mar. 26, 1929.

UNITED STATES PATENT OFFICE.

LLEWELLYN GEORGE TAYLOR, OF'BIRMINGHAM, ENGLAND.

MACHINE FOR CUTTING OFF LENGTHS FROM BARS.

Application filed December 30, 1927, Serial No. 243,640, and in GreatBritain June 17, 1327.

This invention relates to a machine for cutting oil lengths or piecesfrom sohdor hollow metal or other bars, and in which tools similar toturning tools are used. The bar to be operated upon is held stationary,as in a vice positioned in front of the tools, and the latter arecarried by slides mounted to revolve with a spindle axially in line withthe bar-{the tools moving around the work and being fed up to itradially by the slides. Means are provided whereby the two or morecutting tools are coupled and are connected to a single and common feedso that the operation of all the tools on the work is equal andcompulsory by the use oi. the work as a raigid equalizing abutment. Sucha machine is described and illustrated in the British Letters Patent No.25,223 of 1910. v

This invention provides improvements in a cutting oil machine, combininga hollow spindle revoluble in stationary bearings and driven by a wormwheel, carrying a face plate tool provided with slides movable radiallyon the face plate: outwardly by springs and inwardly by a rockable andslidable ring. This ring is mounted over the rear end of the hollowspindle to revolve a slidable abutment ring against which the rockablering forwardly bears and is revoluble with the frame of the machinebeing provided to slide the abutment ring, there being a toothed sectormovable with the yoke, and hand-operated means frame of the machinedriven from the worm wheel to engage the toothed sector to rock it.There are also provided devices for autoniatically holding said means inengagement and for automatically releasing the same, the entirecombination providing a machine oi the type according to the BritishLetters Patent, hereinbefore referred to, designed for manual startingand automatic stoppin In the drawings:

Fig. 1 is a longitudinal, vertical, sectional elevation.

Fig. 2 is a front elevation.

Fig. 3 is a detail of two of the principal parts of Fig. 1. i

Fig. 4 is a left-hand end elevation of'Fig. 3 but with an additionalpart of'the frame ol the inaehii'ie shown in dotted lines.

"With reference; to the drawings, a repre sents the hollow spindlewhich, at its forward and, earriea on a face plate a the two spindlc,ayoke rockable 011 the swingable on the slides (Z and 6, upon each ofwhich is detachably fitted a cutting tool, indicated at (l and 0 Thespindle has bearings at 66-, a within the frame a" of the machine, andis revolved by the worm wheel a The slides d and 6 move across. the faceplate so that the cutting edges (Z e, of the tools advance and recederadially in respect to the axis of the machine, said slides being eachprovided at 1 with a. coiled spring for automatically causing the toolsto retire. Upon the back end of the hollow spindle a is provided anaxially slidable ring f revoluble at all times with the spindle. Tocause said ring to so revolve there are rigidly attached to it theblocks f which engage corrcsponding slots f" formed through the walls ofthe hollow spindle, the ring being externally mounted upon thespindle sothat it can rock to bring'its axis inclined to the axis of the spindle.To the blocks of this ring, and, therefore, to the ring itself, the twoslides (Z and e are connected by two connectors which are each partly asteel strip 9 and partly a piece of cycle chain 9 the steel stripconnecting with the block at fiand the cycle chain with the slide at andwith each other at y, the right-an gled bend in each connector beingtaken care of by passing round a roller g which is pivoted to theforward end of the hollow spindle a. A movement of the ring 7 rearwardlyparallel withthe axis of the machine pulls both slides d and e and thetools they carry inwardly, equally and simultancoiisly towards the work,which is a bar gripped in any form of vice e0 fitted to the extremefront of the machine, to be hold while a piece is being cut from it.

The ring 1'' is automatically pulled forwardly by the springs y of thetwo slides (Z and e, and rearwardly against the action of saidsprings itis slid from the operation of an abutment ring 72, mounted over thespindle to slide axially of the machine and to' rotate therewith andwith the ring f In front of the abutment ring 729 is a nonrotatablc ring719 loosely mounted over the spindle to slide axially of the machinewith out at any time rotating with the spindle,

being held from rotation by a peg 2 carried by the ring,.engaging agroove 3 of the trams w.

The engagement between the ring f and the ring 77. is by opposedspherical surfaces 7] which, without separating at any time, permit of:tli a groelring in addition to sliding, so that its axis may becomemehned or parallel to the axle of the machine. The opposing surfaces 2'have the efl ect of permitting the ring 7 to rock at any time while'itis being forcedrearwardly by the ring if to advance the slides clande.

The'rocking' action of the ring f is for equah ,izing the work on thetwo toois (Z and c using the work as a rigid abutment so that both toolsout together and equally.

All the aforesaid 18 substantially in accordancewith theprior Britishpatent referred to except for the drive to the spindle Theinvention'provides the maCchine with along the hollow spindle (i.truImion-IO oppositeto thetrunn'l'on 5 workby the worinwheel a and thethe ring It? from rotation.

the followingadditional" features.

etc-is a. toothed sector or arm mounted to swingwith a trunnion5'h-aving a bearing at 6 Within a fhrked-branch '("Zof the frame a; ofthe machine. This trunnion 5 connects inwardly of the bearing with arigidly built rockablo'yoke 8 which, by a peg 9, connects with thesiidable and'nonrotatable rin it a 7 so; that when the yoke is-rockedfrom the sector 4 the rings)??? and 71 are moved The yoke has a ing;within-hi1 opposite branch 11 of .the

' frame 03 as a bearing, and-connects withthe rirwv 7r? onositel b y a)e 12 similar to the peg 9, so-th'at the rocking of the yoke i 8 impartsequal movement to the ring h swing in one direction,

on both-sides,'=the pegs 9 and 12 beingearri'ed bythe yoke and movingattheir inner end in vertical gaps or slots 13 of the l ne-1 Y V The yoke8has at oneside thereof a rigid extension 14 carryingea screw pin 15opera tive an abutment 16 of the frame '05,

so that the yoke 8, zuid, therefore, the toothed intheir combined Q17,whichdrives a second worm wheel 18 mounted upon ashort shaft 19, to theother sector 4. p .moved intoengagement with the toothed sector by hand,and is automatically held- 7 in such engagement- ,until the cutting:tools endof which short shaft a second worm 20 is attached. for .meshingwith the teeth t of the toothed sector 4;.

is runnmg't'he shaft 19 isicontmuousiy Vhile the machine revolvmg. Theshaft 19 andv the gartscarried thereby are mounted within aframing 21swingable bodily about the axis 22 0f the worm 1-7, so that saidframeand the shaft 19, and theparts carried thereby, can swing in thevertical plane about the axis 22 to engage and disengage the worm 20,from the toothed The worm 20wh1le revolvln is have finished their work,when-the worm 20 peg 2' to hold automatically falls from the toothedscctor out of gear.

These operations are carried out in the following manner A hand bar 28'is used for swim, the worm 20 into gear with the toothed sector l. \Vhruthis takes place the frame 21, by a hook 24', enga es a catch arm 25 ot'a. lover 243, pivoted at 27 to the frame of the machine and moved in onedirection by a coiled spring'28applied to its long 'or arm 29. Anextension arm 30 also forms part of this lever 26 and coacts with anextension I)! upen'the frame 21 toforcibly disengr'uz o the worm 20from-the toothed sector in case the weight of the frame 21, et cctcra,shouid be insuiiiciont for said disengagement. The downward swing of theframe 21 is limited by an extension 32 of said frame ougrzuruu: astationary peg 33'of the main frame or, this peg 'also limiting theupward swing; of the frame 21 by the slot 34; which the peg; 33 engages.

The toothed sector l carries as part thereof anadjustable pusher 855,whose purpose is to knock the catch arm 25 out of action-at the finishof the cutting off oper: ion to release the hook 24: so that the worm 20may fall out of gear from the toothed sector 4, and'ifthere should beany sticking it will forcibly remove the worm from the sector. As thetoothedsector finishes its swing, the adjustable pusher operates againstthe arm 29' of the lever 26, and removes the catch ar1n-25'from the hook2t, immediately afterwards causing the extension arm 30 to operateagainst the extension 31 if the worm 20 has not fallen away from and isdisengaged from the teeth of the sector.

Figz l shows the parts of the machine in normal. positions. Assuming thepusher 3.1 has been adjusted to the desired operation of the tools, theworm 20, while revolving, is swung upwardly by hand into engagement withthe teeth of the toothed sector, so that the hook 24-- and the can-1125ionuagg'c. "his imn'iediately causes the sector 4- to swing witlritstrunnions 5 and 10 to move the rings 71, and it" and put on the cut atthe tools, maintaining said cut until the pusher 3:") strikes the arm 2)of the lever so. when the catch arm 25wvill disengage the hoot 2t andallow the worm 20 to fall away from the toothed sector out of gear, or.tailing this, causing said worm to be forcibly moved out of gear, theworm 20 revolving the cniiro tnne.

Itwill be quite clear from what has been previously described how themovement of the rings'ifi" and 71 operates upon the ring); and how thesurfaces 1' between those two parts operate to equalize the cut of thetools on the work, using the work as an equalizing': abutment. 1

The toothed sector 4 is moved tonor'mal position in relation to the worm20 as represented in Fig. 1 by the springs 11 in the tool slides, saidsprings causing the tools to rerede immediately the worm 20 has becomediseinz agcd from the toothed sector ilpulling forwardly the rings f,and 721*, and, therefore, swinging the toothed sector.

'll'ie pi'illey 36 revolves with the spindle a and is utilized fordriving a suds pump for feeding" suds to the tools.

Having now described my invention, what l claim and desire to secure byLetters Patent is a 1. A machine for cutting off lengths from bars,ii'ichiding a hollow spindle revoluhle .in stationary bearings anddriven by a worm wheel and carrying a face plate, tool sl' le movableradially on the face plate, springs for moving said slides in onedirection, a roe-liable and slidable ring mounted over the rear end ofthe hollow spindle to revolve therewith, means connecting the ring and 7slides so that the ring moves the slides in opposite directions to thesprii'igs, a siidable abutment ring against which the rockable ringforwardly bears and which revoluble with the spin dle, a yoke rockableon the frame of the machine to slide the abutment ring, a toothed sectorn'iovable with the yoke, handoperated means swingable upon the frame ofthe machine and driven from the worm wheel to engage and rock thetoothed sector, and devices for automatically holding said means inengagement with the toothed seetor and for automatically releasing saidengagement.

2. A machine for cutting off lengths from bars including a hollowspindle revoluble in stationary bearings and driven by a worm wheel andcarrying a face plate, tool slides movable radially on the face platesprings for moving said slides outwardly, a rockable and. slidahle ringconnected to the slides for moving the slides inwardly, said ring beingmounted over the rear end of the hollow spindle to revolve therewith, aslidahle abutment ring against which the rockable ring forwardly bearsand which is revoluble with the spindle, a yoke rockahle on the frame ofthe machine to slide the abutment ring, a toothed sector mounted upon atrunnion of the yoke, a hand-operated swingable frame pivoted to theframe of the machine and carrying a short shaft and two worms the one togear with the worm wheel and the other with the toothed sector, anddevices for automatically holding the one worm. in engagemont with thetoothed sector and for automatically role: sing same at the end of atraverse.

3. A. machine for cutting off lengths from bars, inehuling a hollowspindle reroluble in stationary hearings and driven by a worm, wheel andcarryim, a face plate, tool slides movable radially on the face plate,springs for moving saiu slides outwi'n'dly, a rockable and slidable ringconnected to the slides for movingthe slidesinwardly, said ring beingmounted over the rear end. of the hollow spindle to revolve therewith, aslidahle abutment ring against which the rockable ring forwardly hearsand which. is revoluble with the spii'idle, a yohe bifuicating thespindle and. rochehle on the frame of the machine to slide the abutmentring, a toothed sector mounted upon a trunnirm of the yoke, ahend-operated swingnible frame pivoted to the frame of the machine andcarrying a short sl'iaft upon. whioii mounted a worm and a worm wheel,the worm to engage the teeth of the toothed sector, a worm mounted onthe point of pivoting of the frame to gear with the worm wheel on theshort shaft, and with the worn'iv wheel on the machine spindle, a catchon the free end of the swingalgile frame, a pivoted catch on the frameof the machine to engage the former catch, a spring to maintain thepivoted catch in one position, and an adjustable pusher carried by thetoothed sector to operate upon the pivoted catch.

l. A machine for cutting off lengths from bars, including a hollowspindle revoluble in statim'iary hearings and. driven by a worm wheeland carrying a face plate, tool slides movahle radially on the faceplate out wardly by springs and inwardly by a rock: able and slidahlering mounted over the rear end. of the hollow spindle to revolvetherewith, flexible connections hetwcen the rockable ring and theslides, a slidable abutment ring against which. the roclotble ringforwardly bears and revoluble with the spindle,

a yoke rochahle on the frame of the machine to slide the abutn'iei'itring which carries a toothed sector, and hand-operated means swing-ableupon the frameof the machine and driven from the worm wheel to engagethe toothed sector for rocking said sector.

In testimony whereof I have affixed my signature.

LLEXVELLYN GEORGE TAYLOR.

